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Diagrammatic section to illustrate the overlap of continental beds over a retreatal marine series.

Overlap of Continental Beds

Diagrammatic section to illustrate the overlap of continental beds over a retreatal marine series.

Restored section from the Appalachians to the Cincinnati region, to show the overlaps of continental and marine strata.

Overlap from the Appalachians to Cincinnati

Restored section from the Appalachians to the Cincinnati region, to show the overlaps of continental…

East-west section across the state of New York, showing the various types of overlap characteristic of the formations. The depression in Utica is due to erosion.

Various Types of Overlap Across New York State

East-west section across the state of New York, showing the various types of overlap characteristic…